Sample Alchemy sources in Logic Pro for iPad

Sample Alchemy sound-generating modules are called sources. Four independent sources (labeled A/B/C/D) are available in each preset, and each source has an identical set of controls.

Source components are shown when you tap the A, B, C, and D buttons to select the source you want to edit. Some parameters can be set globally or per source. Global parameters override individual source settings. If you’re new to synthesis or unfamiliar with different synthesis approaches, see Intro to synthesizers.

The components in each source are displayed in three modules: source, synthesis, and filter.

Source module: The first module displays the parameters for the selected source. The first parameter available here changes depending on the selected play mode. For example, in Classic mode you can control the speed at which the sound is played, and in Loop mode you can control the loop speed. The other parameters in this column let you set the panning and tuning for each source.
Synthesis module: The second module provides multiple sound-generating modes based on different methods of synthesis. Here you can set a synthesis mode for each source. See Sample Alchemy synthesis modes.
Filter module: The third module contains the filter. Here you can set the filter for each source or globally. See Sample Alchemy Filters.

Source module parameters

Playback Speed knob: Set the sample playback speed of the sample. Set low speed values to create gradually evolving textures.
Loop Speed knob: Set the sample loop speed between the start point and end point. At 100% the loop is synced to the speed of the project tempo.
Scrub Jitter knob: Set the depth of the jitter action.
Bow Rate knob: Set the rate of the bow action.
Bow Rate Sync button: Allows you to set the rate in tempo synced note values, instead of Hz.
Arp Rate: Set the duration of each arpeggiator step. The arpeggiator is synchronized with the project tempo, and Rate is set in bars/beats.
Pan knob: Set the source output position in the stereo field.
Tune Coarse knob: Tune the source in semitone increments.
Tune Fine knob: Tune the source pitch in increments of one cent (one hundredth of a semitone).

Turn on a source in Sample Alchemy

Tap a source button (A/B/C/D) to turn on a source.

Turn off a source in Sample Alchemy

Tap a highlighted source button (A/B/C/D) to turn off a source.

Select a source in Sample Alchemy

Tap a source handle (A/B/C/D).

Select multiple sources in Sample Alchemy

Tap the Source menu, then choose Select All.

Mix sources in Sample Alchemy

Tap the Mixer button on the top left side of Sample Alchemy, then drag a volume level up or down.

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Logic Pro User Guide for iPad